Ethereum's Purpose, Ecosystem, and Evolution BDC Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A company wants to build a DApp that allows users to trade digital collectibles without a central authority. They want to ensure that ownership is verifiable and transferable. Which Ethereum feature is most directly relevant to this use case?

   • AThe Ethereum Virtual Machine (EVM) alone
   • BThe proof-of-stake consensus mechanism
   • CThe Ethereum Name Service (ENS)
   • DSmart contracts that implement an ERC-721 token standard
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A blockchain consultant is advising a client who wants to run a validator node on Ethereum after the transition to proof-of-stake. Which ecosystem component is essential for the client to operate as a validator?

   • AAn execution client and a consensus client
   • BA hardware wallet with 32 ETH
   • CA mining rig with GPUs
   • DA light client only
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A developer is setting up a development environment and wants to deploy a smart contract to a testnet that closely mimics mainnet conditions. Which testnet is currently recommended for this purpose?

   • ARopsten
   • BRinkeby
   • CSepolia
   • DKovan
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   An organization is considering migrating its existing Ethereum-based application to a more energy-efficient consensus mechanism. They want to reduce the environmental impact of transaction validation while maintaining the same level of security and decentralization. Which Ethereum upgrade directly addresses this concern?

   • AThe Metropolis upgrade, which introduced new features
   • BThe Merge, which transitioned Ethereum from proof-of-work to proof-of-stake
   • CThe Constantinople upgrade, which optimized gas costs
   • DThe Homestead upgrade, which stabilized the network
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A company wants to create a decentralized voting system where votes are recorded on a public ledger and anyone can verify the results. They plan to use Ethereum. Which aspect of Ethereum's purpose makes this suitable?

   • AEthereum provides a centralized database that is easy to query for vote counts.
   • BEthereum provides a private network that only authorized users can access.
   • CEthereum provides a storage service for large files like videos.
   • DEthereum provides a decentralized platform for running smart contracts that can enforce voting rules and record votes transparently.
   Reveal Solution Discussion Select an answer first